DE3870425D1 - DETECTING DEVICE FOR ACID AND BASIC MEDIA. - Google Patents

DETECTING DEVICE FOR ACID AND BASIC MEDIA.

Info

Publication number
DE3870425D1
DE3870425D1 DE8888310635T DE3870425T DE3870425D1 DE 3870425 D1 DE3870425 D1 DE 3870425D1 DE 8888310635 T DE8888310635 T DE 8888310635T DE 3870425 T DE3870425 T DE 3870425T DE 3870425 D1 DE3870425 D1 DE 3870425D1
Authority
DE
Germany
Prior art keywords
acid
detecting device
alkali
substance
basic media
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE8888310635T
Other languages
German (de)
Inventor
Andrea Gellan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WL Gore and Associates Inc
Original Assignee
WL Gore and Associates Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WL Gore and Associates Inc filed Critical WL Gore and Associates Inc
Application granted granted Critical
Publication of DE3870425D1 publication Critical patent/DE3870425D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/165—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means by means of cables or similar elongated devices, e.g. tapes

Abstract

A detection system for a mineral acid or organic acid or alkali comprises a pair of conductors separated by an insulating material such as microporous PTFE, which is impregnated with a substance which is hydrophobic but which, on contact with a said acid or alkali, reacts to form a substance capable of transmitting the acid or alkali, thereby varying an electrical characteristic substance such that a physical characteristic, e.g. impedance or capacitance, of the insulating material, and means for detecting the variation of said electrical characteristic.
DE8888310635T 1987-11-30 1988-11-11 DETECTING DEVICE FOR ACID AND BASIC MEDIA. Expired - Fee Related DE3870425D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB878727981A GB8727981D0 (en) 1987-11-30 1987-11-30 Detection system for acid

Publications (1)

Publication Number Publication Date
DE3870425D1 true DE3870425D1 (en) 1992-05-27

Family

ID=10627757

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8888310635T Expired - Fee Related DE3870425D1 (en) 1987-11-30 1988-11-11 DETECTING DEVICE FOR ACID AND BASIC MEDIA.

Country Status (6)

Country Link
EP (1) EP0322101B1 (en)
AT (1) ATE75312T1 (en)
AU (1) AU2813989A (en)
DE (1) DE3870425D1 (en)
GB (2) GB8727981D0 (en)
WO (1) WO1989005446A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721970A (en) * 1971-10-06 1973-03-20 Atomic Energy Commission Alkali metal leak detector
DE3426833A1 (en) * 1984-07-20 1986-01-23 W.L. Gore & Co GmbH, 8011 Putzbrunn LEAK DETECTING DEVICE FOR ACID AND BASIC MEDIA
JPS6221034A (en) * 1985-07-19 1987-01-29 Junkosha Co Ltd Liquid leak detection sensor
JPS62161045A (en) * 1986-01-08 1987-07-17 Junkosha Co Ltd Sensor for detecting corrosive liquid
US4918977A (en) * 1986-09-30 1990-04-24 Tatsuta Electric Wire And Cable Co., Ltd. Liquid leakage detector line

Also Published As

Publication number Publication date
GB8727981D0 (en) 1988-01-06
EP0322101A1 (en) 1989-06-28
GB2212925A (en) 1989-08-02
WO1989005446A1 (en) 1989-06-15
GB2212925B (en) 1991-09-11
GB8826469D0 (en) 1988-12-14
AU2813989A (en) 1989-07-05
ATE75312T1 (en) 1992-05-15
EP0322101B1 (en) 1992-04-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee